/Engine/Source/Runtime/Experimental/Chaos/Public/PhysicsProxy/GeometryCollectionPhysicsProxy.h
[Chaos::FPBDRigidClusteredParticleHandle](API\Runtime\Chaos\Chaos\FPBDRigidClusteredParticleHandle) * FindClusteredParticleHandleByItemIndex_Internal ( [FGeometryCollectionItemIndex](API\Runtime\Chaos\PhysicsProxy\FGeometryCollectionItemIndex) ItemIndex ) const